Selective signaling apparatus



May 27; 1930. H. D. COLMAN SELECTIVE SIGNALING APPARATUS Filed July 6, 1926' 6 Sheets-Sheet INVENTOR V Hawardfl [0]]77417 H IIIVINSULATION t INSULATION ATTORNEYS May 27, 1930.

H. D. COLMAN SELECTIVE SIGNALING APPARATUS Filed July 6. 1926 6 Sheets-Sheet 2 INSULATION I: v I 2 15 5/? f f c 14 5 INSULATIOIII Jl v INVENTOR him/#211717 [0111x411 ATTORNEYS May 27, 1930- H. D. COLMAN 1,760,478

SELECTIVE SIGNALING APPARATUS Filed July 6, 1926 6 Sheets-Sheet 3 F15 ll] INVENTOR Hmmzra [47/177517 ATTORNEYS May 27, 1930. H. D. COLMAN SELECTIVE SIGNALING APPARATUS Filed July 6, 1926 6 Sheets-Sheet INVENTOR Huh/Aral? [Di 177, 27]

ATTORNEYS May 27, 1930. H. D. COLMAN QRTJECTIVE SIGNALING APPARATUS Filed July 6. 1926 6 Sheets-Sheet 5 II I II '51 I Q 1} HI 54 M 49 MI "II INSULATION e I I I A 55 1- U; 1 v EEEIEEIE: I l|i 'x v li INSULATION V 7 LII JE I A c INVENTOR f/azz/qrdfl. 1: 011771477 May 27, 1930. H. D. COLMAN 1,750,473

SELECTIVE SIGNALING APPARATUS Filed July 6, 1926 6 Sheets-Sheet 6 INVENTOR HUM/1P0 5 50/0734 ATTORN EYS Patented May 27, 1930 PA/TENT OFFICE HOWARD D. COLMAN, OF RDCKIORD, ILLINOIS SELECTIVE SIGNALING APPARATUS Application filed July 6, 1926. Serial No. 120,763.

The invention relates in general to a selective signaling apparatus, and more especially to a controller responsive to a predetermined codal signal transmitted from a remote point and operating selectively under the control of such signal to initiate one or more operations as desired. In certain of its aspects the invention relates to a selector mechanism subject to control from a remote point by radiant energy.

One object of the invention is to provide a selective signaling apparatus including a combined selector and distributor of a novel and advantageous character embodying a series of selector elements which are presented in rapid succession to an operating means responsive to a predetermined codal signal in order that such elements may be operated in a predetermined combination.

Another object is to. provide a controller having a series of individually movable selector elements adapted to be set in motion by the start impulse of a received signal, for continuous operation through a fixed cycle, and signal-responsive operating means for moping said elements selectively during such 0 c e. I

A further object is to providea controller embodying two parts normally held against relative movement by a series of selector elements which when moved through a predetermined operating cycle are selectivel oper-' 'ated in response to a preconcerted co al signal only, and render said parts 0 erative to actuate a switch or other device or controlling or initiating the operation of a desired mechanism or instrumentality. Still another object is to provide a controller inwhich the selector elements are mounted in a rotary drum or carrier for movement successively mto operative relation with an operating means for such elements, and in which the elements are operated by power derived from the rotation of the drum but underthe control of a signal-responsive means.

Another object is to provide, in a selective signaling system means, for automatically compensating for sli ht variations in speed between sending an receiving mechamsms 50 of the start-stop type, to better insure a proper operative relation between a series of elements and a member adapted to operate thereon successively in timed relation to the units of a codal signal transmitted by the v sending mechanism.

A further object is to provide a selective receiver in which one unlt of a signal combination may be received while the eifect of the preceding unit of the signal is retained for the purpose of distribution.

A further object is to provide a combined selector and distributor having a rotary drum and a synchronous electromagnetic motor for operating said drum at a predetermined substantially constant speed.

Another object is to provide a receiving apparatus of novel and advantageous char acter which is responsive to a codal signal the units of which may be represented by fields of radiant energy.

Still another object is to provide a receiving apparatus responsive to intermittent fields of radiant energy and including a detector tube and electromagnetic means in circuit therewith so as to operate under the control of the received energy.

Another object is to provide a receiver of the start-stop type having a device adapted to rotate through a complete operating cycle in which a series of selector elements are to be operated in response to the units of a received signal, in combination with means providin in each operating cycle a plurality of contro periods corresponding to the units of the received signal and of a definite duration determined by the o eration of the rotary device itself and in ependently of the length of the received signal units.

A further object is to rovide a receiver of the character just re erred to, having means including a detector tube re nsive to fields of radiant energy constituting the units of the signal, and wherein the means for determining the length of the control periods includes a means operating intermittently under the control 0 the rotating vice, to dischar the grid of the tube.

A' general object is to provide acon'struction for the controller and its operating means, which is relatively simple, so as to be invention is susceptible to use in controlling such mechanismsas telegraph and telephone apparatus, train despatch mechanisms, submarines, aeroplanes, and the like. In the present instance, I have illustrated and will hereinafter describe my invention in a-form which is especially applicable to the control from a moving motor vehicle of a garage door operating mechanism.

In carrying out my invention I employ a controller in the form of a rotary drum composed of 'two sections mounted for a limited relative rotational movement. The two sections are normally locked together by a series of selector elements in the form of axially slidable pins which, when operated in a preconcerted combination, release or unlock the two sections for relative movement. The drum is started under the control of electromagnetic means and is driven through a predetermined operating cycle (one revolution) at a substantially constant speed and in substantial synchronism with an apparatus for sending'a codal signalcorresponding to the combination to be selected. Thus, the sending apparatus also operates through a predetermined cycle, being started in the present instance under manual control. 'The sending and receiving apparatus, therefore, are in the nature of start-stop mechanisms, the receiver having means operating in response to the successive units of a transmitted signal to control the selection of a predetermined combination of elements.

Near the end of the operating cycle of the drum, the two sections thereof are caused to move relative to each other as permitted by the operation of the selector elements in the predetermined combination, and such rel ative movement is utilized to operate a switch or other control device. The selector elements are operated under the control of the received signal but by power derived from the rotation of the controller drum.

Associated with the controller, in the present instance, is an apparatus adapted for-the reception of intermittent fields or wave trains of electromagnetic energy, which together with the intervening spaces constitute the units of the codal signal. This receiving apparatus includes an antenna and a detector tube, with anelectromagnetic means in the plate circuit of the tube operated in response to variations in the current in such circuit to start the controller and govern the selectoroperating means. In order that the units of the signals may be transmitted and received in close succession, means is provided to dlscharge the grid of the tube periodically once for each such unit of the signal.

Referring now to the accompanying draw- 111 s:

I igure 1 is an elevational view looking toward one end of the device.

Fig.- 2 is a fragmentary yiew illustrating the electromagnetic synchronous'motor for operating the rotary drum.

Fig. 3 is a fragmentary elevation of the rotary drum and the means operating under the control of the received codal signal for actuating the pins of the drum. 7

Fig. 4 is an elevational view of the end of the device opposite that shown in Fig. 1, the detector tube being omitted.

Fig. 5 is a horizontal plan section illustrating more especially the pin drum and the means for pushing the pins under the cont r ol of the electromagnetic means.

Fig. 6 is a fragmentary sectional view through-a portion of the drum and illustrating a detail of construction.

Figs.- 7 and 8 are views partially schematic in character, showing the arrangement of the pins in the drum and illustrating the manner in which the pins in the drum constitute a combination device operable only by a signal transmitted in accordance with the predetermined code.

Figs. 9 and 10 are detail sectional views illustrating the means employed for restoring the relatively movable parts ofthe drum to their initial positions.

Fig. 11 is a view partially schematic in character illustrating the relation between the means for pushing the pins and the means for discharging the grid of the detector tube.

Figs. 12 and 13 are perspective views illustrating the operation of the switch by the pin drum.

Figs. 14 to 17 inclusive are schematic views illustrating more especially the arrangement for discharging the grid to render the magnetic field produced by the stopping of the synchronous motor ineffective.

Fig. 18is a front elevational view'of the device, a portion being broken away and part shown in section to illustrate details of construction.

Fig. 19 is a view of the several contacts operated under the control of the pin drum to initiate the several operations desired.

Fig. 20 is a wiring diagram of the receiving apparatus including diagrammatic illustrations of certain of the operating parts.

Fig. 21 illustrates similarly a transmitting apparatus. 1

Fig. 22 is a plan View of the transmitter.

The control device, as above indicated, is in the present instance in the form of a drum indicated generally by the numeral 1. This drum is made in two sections, (Figs. 5, 7 and 8) one of which comprises a disk 2 and the are mountedupon a shaft so that the two sections of the drum are capable of a limited relative rotational movement for the purpose of operating an electric switch 5 (Fi s. 12 and 13) as will be presently described. erein the disk 2 is loose upon the shaft and the disks 3 and 4 are fast.

The two sections of the drum are normally held or locked together by means of selector elements in the form of axially slidable bars or pins 6 arranged near the periphery of the drum in a circular series and in spaced relation. Of these pins 6 there are in the present instance eleven, and in addition the drum carries a plurality of auxiliary control pins (herein three) designated respectively by the numerals 7, 8 and 9. Initially each of the pins is set by a reset device or cam 10 formed on a stationary disk 11 located at one end of the drum, this cam being positioned so as to reset each pin before it is presented to a pin pushing or actuating means 12 which constitutes the distributor for the units of the received signal.

The pins 6 are of e ual length but are formed in two sections ?Fig. 7) so arranged that the dividing lines in the case of certain of the pins are initially located within the disk 2, and when pushed are located between the disks 2 and 3. In the case of the other pins, the dividing lines are initially located between the disks 2 and 3, and if these pins are pushed, said lines will be positioned within the disk 3. Thus, it will be seen that the pins of the first group must, in the rotationof the drum, be pushed to position their dividing lines between the disks 2 and 3, in order to permit relative rotation between the two sections of the drum; and on the other hand the pins which have their dividing lines initially locatedbetween the two disks 2 and 3 must not be pushed, for if they are, their division lines will fall within the disk 3 (Fig. 8), and thus they will serve to lock the disks against relative rotation. The arrangement is such, therefore, that the pins which have their dividing lines ofiset with respect to the space between the two sections of the drum are those which must be-operated inaccordance with the prearranged plan, and only such pins must be operated in order to permit rela' tive movement between the disks 2 and 3.

The pins 7, 8 and 9 are non-seetional in character and respectively carry collars 7 8 and 9' which, as will be hereinafter more fully set forth, are adapted to operate one or more auxiliary switches. Figs. 7, 8,12 and 13, the pins 7, 8 and 9 project through an arcuate slot 13 in the disk 2, so as to permit relative rotation between As shown in tion 13 (Figs. 4 and 9) between the disks 2 and 3 of the drum.

The shaft 5 carrying the drum, is journalled in suitable standards 14 and 15 rising from a base plate 16, these standards being spaced apart to receive the drum between them.

The drum is arranged to be rotated by suitable means comprising, in the present instance, a synchronous electromagnetic motor including an eleetromagnet 17 having an armature 18. The magnet 17 is mounted upon a horizontal arm 19 secured upon the upper end of an upright frame member 20 rising fromthe rear side of the base 16; and the ar1nature 18 is mounted upon a pair of spaced resilient arms 21 securely clamped in a fixed shaft 22 supported at opposite ends in depending brackets 23. As shown in Figs. 2 and 4, this fixed shaft 22 is cut to form a removable section 24 which is fastened to the shaft proper by means of bolts 25, with the rear ends of the spring arms 21 clamped between the two parts of the shaft.

The magnet 17 is arranged to be energized in the present instance, from a source of alternating current, and the magnet, responding to the alternations in current occurring twice per cycle, rapidly raises and lowers a spring pawl 26 depending from the armature 18. Said. pawl 26 is adapted to engage with a ratchet wheel 27 fast upon a shaft 28 supported at its opposite ends in a pair of bracket arms 29 secured to opposite sides of the standard or post 152 The shaft 28 carries a worm 30 meshing with a worm wheel 31 (Fig. which is fast upon the shaft 5, the latter being extended beyond the post 15. A spring retaining pawl 32 coacts' with the ratchet wheel upon the side opposite the pawl 26 to prevent reverse rotation. It has been found that'with this arrangement the shaft 5 may be rotated at a substantially constant speed due to the fact that the alternating current supply 1s, according to present practice, maintained at a substantially constant frequency.

Moreover, it has been found that the magnot 17, together with the means for effecting rotation of the shaft 5 when the magnet is energized, constitutes a vibratory electric motor which is adapted to attain its normal torque and speed substantially instantaneously, and which is therefore especially adapted for driving the rotary carrier for the selector elements under conditions where the motor must be started and stopped at the beginning and end of each operating cycle.

Suitable means is employed, as hereinafter set forth, for controlling the operation of the magnet 17 so as to effect rotation of the shaft 5 and hence of the pin drum 1 through one revolution or operatln cycle. In such rotation the pins in the rum are successively moved into position relative to the distributor 12.

The distributor 12 is preferably of such a character that it is merely controlled by the codal signal, the power for pushing the pins being derived from the rotation of the shaft by the synchronous electromagnetic motor 17,

,18. To this end said distributor comprises a pivoted member 33 which may be termed a plow, and which is mountedso as to be disposed normally in the path of the projecting ends of the pins. This plow 33 (Fig. 5) is in the form of a. metallic finger pivotedat one end as at 34, and having at its other end a bent portion which is normally held by a light coiled spring 36 in the path of rotation of the projecting ends of the pins. A combined guide and stop member 37 scrvesto limit the movement of the plow by the spring.

The pins are frictionally held in the drum so as to tend to resist movement by engagement with the plow, and the arrangement is such that unless the plow is restrained from pivotal movement upon being engaged by ,a pin, the spring 36 will permit it to yield without imparting a movement to the pin. The means for frictionally holding the pins against movement may be of any suitable character, that herein shown comprising in each instance (Fig. 6) a radial socket 38 in each of the disks 2 and 3, in, which is seated a coiled expansion spring 39 operating to force a ball 40 into frictional engagement with the pin passing transversely of the outer end of the socket.

The means for controlling the plow 33 so as toeffect the movement of the desired pins, comprises a control figure 41 arranged to coact with a fixed stop member 42 (Figs. 3 and 4) and a coating lug 43 carried by the plow but disposed so as to be capable of moving beneath the stop 42 when unrestrained by the control finger. According to the arrangement employed in the present instance, the finger 41 is normally positioned in interlocking relation to the stops 42 and 43 (see Fig. 3). Thus, when a pin is to be operated, the plow is prevented from yielding and the plow acting as a cam moves the pin by power derived from the rotation of the drum.

The interlocking finger 41 is in the form of an upstanding flange (Fg. 5) on the rear end of a lever arm 44, the forward end of which carries the armature 45 of a relay 46. The lever arm 44 is pivoted between its ends as at 47, between a pair of depending bracket arms 48. The upper ends of these arms are secured upon opposite sides of a bar 49 which carries, at its forward end, the coils of the relay 46.

In the present instance the relay 46 is normally energized during the operating cycle, and is operated upon a decrease in the cur rent flowing through the circuit in which it is interposed, as will be hereinafter described. A spring 50 (Figs. 1 and 18) is anchored at its upper end, as at 51, to the bar 49, and at its lower end to the arm 44 at a point reararm, but the strength of the spring is such as to be unable to overcome the normal attractive force of the relay.

The interlocking finger 41 is thus movable, under the control of the relay 46, into and out of position between the lug 43 on the plow and the stationary stop 42. When the armature is. attracted by the relay, the finger 'blocks the plow so as to push a pin, and when the armature is released the finger is raised into a position above the movable stop 43, thus permitting the plow to yield laterally against the action of the spring 36 (see Fig. 11). Under such a condition, therefore, the finger is held against downward movement by the stop 43 and a pin is not operated.

It will be seen that as the shaft 5 is rotated by the operation of the-electromagnetic motor 17 18, the pins in the drum are presented in rapid succession to the operating device,

12, and that the pins are pushed depending upon whether or not the plow is prevented from yielding laterally by the movement of the interlocking finger 41 under the control of the signal-responsive relay 46. The units of the signal are thus in effect distributed seats to control the selection of the predetermined combination of pins in the controller drum; and it will be observed that as an in cident to the engagement of the plow w1th any one of the pins, the efl'ect of the signal unit which is to be transferred to that pin is' retained until the pin passes out of engagement with the plow. The signal responsive magnet, however, is free to respond to the next unit of the signal combination in ad- Vance of the disengagement of the plow frpm the said pin. Thus the period during wh1c h the magnet is responding to one signal unit may overlap the period during WlllCh the preceding unit is being distributed. The manner in which a signal unit received during the overla ping period is timed to effect the control 0 the plow for that period is hereinafter set forth in connection with the description of the radiant energy detector.

Assuming that the pins 6 occupy the relative positions shown in Fig. 8 at the end of an operating cycle of the drum, it will be apparent that relative rotational movement between the two sections of the drum is permissible, owing to he fact that the dividing lines between the sectional pins are all located between the disk 2 of one section and the disk 3 of the other section. I utilize such relative movement for the purpose of operating a.

lugs 52 and 53 (Figs. 12 and 13) arranged to coact with rollers 54 and 55 mounted on the ends of a pair of spring arms 56 and 57 respectively. The arms 56 and 57 are inclined in an upward and rearward direction as shown in Fig. 4, being suitably fastened at their lower ends upon a block 58 of insulation material. The arm 56 carries at its upper end a laterally extending finger 59 carrying, a contact 60 which is arranged to overlie the contact 61 on the upper end of the arm 57. The rollers 54 and 55 engage yieldably with the peripheries of the disk 2 and 3, and the construction is such that the two lugs engage with their respective rollers simultaneously in the normal or locked relation of the two disks. The roller 54:, however, is adapted upon engagement with the lug 52 to interpose sufficient resistance to the rotation of the disk 2 (the latter being loose on the shaft) to interrupt or retard the rotation of the disk 2 for a brief interval while the disk 3 continues to rotate. As a result, the arm 57 is in this operation elevated in advance of the arm 56 so as to carry the contact 61 into engagement with the contact 60 and thus close the switch formed by these two contacts. If, however, the pins 6 have not been properly set to permit such relative rotation between the two disks, both lugs 52 and 53 simultaneously engage and move their rollers 54 and 55 (Fig. 13) thus maintaining the contacts 60 and 61 in spaced relation and preventing closing of the switch.

The pins 7, 8 and 9 may or may not be pushedin the rotative cycle of the drum depending upon whether or not the codal signal has included therein units intended to efi'ect the operations controlled by these pins. Herein the pins 7 and 8 with their collars 7 and 8, are arranged to control respectively two sets of switch contacts 62 and 63 (Fig. 19); and the pin 9, with its collar 9 is arranged to control two sets of contacts 64.- and 65. As herein shown, each set of contacts 62 and 63, and 64: and65, comprises a relatively stationary contact and a movable contact. The movable contacts in each case are mounted on suitable spring arms 66, and carry rollers 67 and 67 and 68 and 68. The rollers 67 and 67 are adapted to be engaged selectively by the collar 9 on the pin 9, and the rollers 68 and 68 are arranged to be engaged selectivelyby the collars 7 and 8 on the pins 7 and 8.

It will be obvious that the switch mechanism which is thus arranged to be actuated selectively in the operation of the controller, may vary in construction and arrangement, as desired. When applied to the control of garage doors, the switch contacts 60 and 61 may serve to control the operation of the motor circuit, while one set of auxiliary switch contacts may govern the selection of one of two sets of doors, and the other set, the operation of the garage lighting system, all as set forth in a copending application of Duncan J. Stewart, Serial N 0. 177,555, filed March 23, 1927.

To reset the two sections of the pin drum at the end of each operating cycle, I employ the device shown in Figs. 9 and 10, w ich provides the pin and slot connection 13 for limiting the extent of relative movement between the drum sections. This device comprises a pin 69 passing through both sections of the drum and carrying a cylindrical head 69 slidable through the disk 3. Said head has a conically tapered end arranged to enter a complementary seat 69 in the disk 2 under the action of acoiledexpansionspring 69. A slot 69 is formed in the disk 2 to receive the outer end of the pin 69, but this slot is located slightly elf-center with respect to the conical seat 69". Near the end of the operating cycle of the pin drum, the pin 69 is adapted to engage with a stationary cam member 69 to operate the pin 69 against the. action of its spring '69, thus removing the head 69 from its seat (Fig. 10). The pin 69 is now free to move in its slot 69 so as to permit relative movement between the disks 2 and 3 while the pin moves with the disk 3 from one side of the slot 69 to the other. Thereupon the 'pin is disengaged from the cam member 69 and the spring 69 operates to reseat the head 69* in its seat to restore the disks 2 and 3 to their normal relation (Fig. 9).

As first above indicated the means for selectively operating the pins of the controller 100 may be responsive to various forms of transmitted energy, including line current impulses and radiant energy in its various forms. In the present embodiment the pin operating means 12 is responsive to a codal 105 signal, the units of which are formed by the intermittent transmission of electromagnetic induction fields. The use of this form of energy is preferable when possible in connection with remote control systems for the no reason that such fields being limited in extent of range present little or no difiiculties from the standpoint of interference with radio communication. On the other hand, 115 where the distance to be covered is relatively great, fields produced by Hertzian waves may be preferred.

Referring now to Figs; 21 and 22, I have shown diagrammatically a transmitting ap- 120 paratus such as may be employed in the trans mission of intermittent induction fields from a motor vehicle, and I have shown diagrammatically in Fig. 20 a receiving apparatus embodying my controller.

Referring first to the apparatus shown in Figs. 21 and 22, the sending means may comprise one or more sending disks (herein two) 70 and 7 0' arranged to operate through successive cycles to close switches 71 and 71'. 133

age battery of a motor-vehicle The former is interposed in a circuit 72 including a battery 73 (which may be the storand the primary 74 of an induction coil 5 having the usual vibrator 76. A spark gap 77 is connected across the secondary 74 of the coil 75 and in series with a coil or loop aerial 78 which may be mounted beneath one of the running boards of a motor vehicle. denser 79 is interposed in the loop or oscillation circuit. The switch 71" is interposed in the switch contacts of the switch 71 inter-' mittently, and the disk 7 0, which has in the present instance a single elevation, has a follower 86 to close the switch 71 once for each cycle of operation. "It will be evident, therefore, that in each cycle of operation of the disks 70 and 7 0 switches 71 and 71- are operated, the former operating intermittently at predetermined intervals and the latter operating once in each cycle but in a predetermined relation to the operation of the switch 71 by the disk 70, these two disks being fast on a shaft 87. Where two elevations 83 occur in succession, they may be combined as indicated at 85 (Fig. 21).

Suitable means is of course provided for rotating the disks 70, 71 through successive cycles. This means generally stated ma comprise an electromagnetic motor inclu ing an electromagnet 88, in circuit with the battery 73, and a pawl and-ratchet mechanism 89. This motor is arranged to be' started'by a hand .operated switch 90 and stopped by a switch 91 whichis controlled by a disk 92. on the shaft 87 The flow of current to the ma netis controlled by an interrupter 93; am? power is transmitted to the shaft 87 through a spring (not shown) in which energy is stored during each operating cycle for use in startin the succeeding operation. 94 (Fig. 22) esignates generally a startin device tri ped by the magnet 88 upon t e closing 0 the switch 90, and 95 isan escapement mechanism operating to maintain the speed of the shaft 87 substantially constant. Inasmuch .as the transmitting mechanismper se forms no part of the present invention, it is deemedfunnecessary to illustrate anddescribe the same in detail, reference being made, for a complete disclosure,

to my copending application Serial No. 175,377, filed March 14, 1927.

A con- Itwill be understood from the foregoing brief description, however, that subject to the operation of the switch 90 to start the driving mechanism, and the switch 82 controlling the car lighting system, intermittent induction fields will radiate from the oscillation loop 78, these fields occurring at predetermined intervals corresponding to the spacing of the pins in the controller which are not to be operated. In this connection, it will be remembered, the cont-roller is so arranged that the pin operating means is normally adapted to operate the pins in the rotation of the drum.

Referring now to Fig. 20, the receiving apparatus comprises a grounded antenna 98 which is coupled at 99 with a controlling circuit 100 containing a vacuum detector tube 101 and a fixed condenser 102. A variable condenser 103 is preferably connected across the secondary of the inductive coupling 99.

The tube 101 may in practice be mounted on a bracket 101 (Fig. 1) carrying a socket 101b. As shown in Fig. 20, the tube is of the three element type, including a control element or grid 104, an anode or plate 105 and a cathode or filament 106. The filament has a variable resistance 107 in series therewith, and is heated continually from a 110 volt A. C. line thrdugh a transformer 108 stepping down the voltage to approximately six volts. The current in the plate or controlled circuit 109 is unidirectional in character while the applied voltage is alternating in character. Thus, it will be observed that the antenna circuit is untuned and that the tube input circuit is tuned by the variable condenser 103. Detection is effected b the grid condenser method, no grid lea being employed for reasons which will appear later.

In said plate circuit is interposed electromagnetic means (in the present instance the relay 46) which is in shunt with a condenser 110. The armature 45 of the relay 46 carries, the movable contact of a switch 111 which controlsa circuit 112, 118, containing the electromagnet- 17. This magnet 17, it will be remembered, constitutes the synchronous electro-magnetic motor which operates to drive the drum shaft 5.

, On the shaft 5 is a disk 113 (Figs. 18 and 20) having a notch 114 in its periphery adapted to receive a follower 115 carried by the movable arm 116 of aswitch 117. Said switch 117 in parallel with switch 111 also controls a circuit 118 including the motor magnet, 17 the arrangement being such that when the circuit 112 is initially closed by the switch 111, the motor magnet is operated to drive the drum shaft 5 and thereby the controlling cam disk 113 so as to close the switch 117. The latter switch thus assumes control so as to relieve theswitch 111 controlled by .the armature 45, the circuit 118 through the motor magnet being opened by the operation of the switch 117 at the end of one complete revolution.

It will be seen that the relay 46 in the plate or controlled circuit 109 is normally energized so that the switch 111 is normally open. The received wave trains affect the grid in the well known grid condenser method, producing a negative charge thereon, which results in a decrease in the current in the plate circuit 109 and a consequent release of the relay armature, thus closing the switch 111. Initially, the relayis operated in response to a wave train propagated under the control of a tooth 111 on the sending disk 70, this tooth being located in advance of the signal controlling elements 83, 83 and such initial operation, acts through the switch 111 to start the synchronous driving motor 17 18. The normal flow of current through the relay is restored periodically to energize the relay, by means to be presently described for discharging the accumulated charge on the grid. The manner in which the relay operates to control the operation of the selector elements or pins in the pin drum has been described above. The condenser 110 in parallel with therelay 46 alternately becomes charged and discharges, and thus effects a smoothing out of the wave, which prevents the relay from chattering.

The means for periodically discharging the grid or controlling circuit of the receiving apparatus, to efiect a restoration of the normal flow of current through the plate or controlled circuit, comprises in the present instance a disk 119 (Fig. 20) also mounted on the shaft 5. This disk has formed on its periphery a series of teeth 120 one for each of the series of pins 6, as well as the pins :7, 8 and 9, of the pin drum. Moreover, the spacing of the teeth is such as to correspond to the spacing of the pins in the drum (see Figs. 7 and 8). Thus in the present instance the first eight teeth are spaced a relatively short interval apart, as is the case of the pins 1 to 8 of the drum, and the remaining teeth are spaced a relatively larger distance apart.

as is the case with. the

pins 9 to 14 inclusive of the drum.

Coacting with the disk 120 is a follower 121 on the movable arm of a switch 122, one

side of which is connected to the grid by a,

conductor 123, and the other side of which is connected to a point whose potential is approximately equal to the potential of the filament or positive thereto. As herein shown it is connected by a conductor 124 to the grounded side of the filament circuit. It

will thus be apparent that in the rotation of to thedisk 120, the grid is periodically discharged once for each of the selector elements in the pin drum.

Referring now to Fig. 11, the timing of the discharge in relation to the movement of the pins relative to the plow 33 will be ap to the engagement of a pin with the plow 33,

so that if the relay has been operated by a signal unit so as to effect the release of the armature'45, the lug 43 011 the plow will clear the interlocking or control finger 41, which has moved upwardly from the position shown in Fig. 3, with the operation of the relay and on the other hand, if the relay has not been operated under the control of the received signal, the plow will be blocked by the finger 41 and hence will operate the pin engaging therewith. In either event, the grid will be discharged immediately after the presentation of a pin to the plow so as to insure that the grid is restored to its normal condition, thus enabling it to respond to the succeeding unit of the signal if the plow is to be blocked to effect the operation of the next pin. In other words, at a point in the operating cycle just subsequent to the engagement of the plow 33 by a pin in the drum, the corresponding tooth120 on the disk 119 operates to close the switch 122 and discharge the grid. Thus the 'efi'ective control period during which a signal unit may be received to control the operation of the plow for a given pin, commences with the discharge of the grid at a fixed point after the engagement of the plow by the preceding pin, and ends with the engagement of the plow by the given pin. It is noted in this connection that in the event that the plow has been blocked by the interlocking finger 41, the pressure of the lug 43 against the finger 41 (Fig. 3) is sufficient to hold the finger down. This is true notwithstanding the restoration of the fiow of current through the relay by the discharge of the grid, which restoration follows immediately after the engagement of the plow with the finger. As shown in said Fig. 3, the lower edge of the finger may be bent slightly as indicated at 125 and the end of the lug 43 correspondingly shaped-to insure the maintenance of this holdingengagement between the finger and the lug. a

.It will now be apparent that in the operation of the sending mechanism through one operating cycle,"a codalsignal is transmitted having a series of units which, in the present instance, are formed by. intermittent fields of electromagnetic energy and the intervening spaces in accordance with the arrangement of the elements 83, 83 on the sending disks 7 and After the initial operation of the relay to start the controller, the circuit 118, also containing the motor magnet, is completed by the closing of the switch 117. In the ensuing rotation of the pin drum, the pins are successively presented to the plow 33 and are pushed or not pushed depending upon the character of the signal units as determined by the controlling elements 83, 83 on the sending disks 70 and 7 At the end of this 0 cle, the drum is stopped by the opening 0 the switch 117 under the control of the cam disk 113.

It will thus be apparent that in order to effect the operation of the proper selector elements to unlock the disks 2 and 3 of the drum for relative movement, the sender and receiv er must operate in substantial synchronism.

In order, however, to increase the allowable speed Variations between the driving means for the transmitter and the driving means for the receiver, I provide a greater space be tween the pins in the drum near the end of the series as compared to those at the beginning of the series, and a corresponding spacing of the control elements 83, 83 on the sending disks 70, 7 0. Each of the units of the signal, however, as produced by the elements 83, 83 are of the same duration. Thus a prolonged operating period is provided for each of the latter pins of the series. In order shown in Fig. 20. In each instance, the spacing employed at the end of the series is substantially greater than that employed at the beginning of the series. The result is that the interval of time during which the plow is adapted to be controlled by the finger 41 is 1 prolonged in the case of each of the pins near, the end of the'series.

In order that variation in the speeds of the sending and receiving mechanisms may occur in either direction, the spacing of the pins must be such as tobe presented to the plow substantially at the central point in the enlarged pin operating period. To illustrate clearly the relative spacing of the pins in the controller drum and of the control elements on the sending disks 70, I have in Fig. 20 indicated by 'small figures the numbers. of the pins of the series, and in Fig. 8 I have shown a combined development of the two sending disks 7 0 and 7 0 and similarly indicated the numbers of the corresponding con trolling elements on the sending wheels. l/Vhile in practice two elevations occurring in succession on the sending wheel are combined as above set forth and as shown in Fig. 21, I have in Fig. 8 shown the elevations and depressions individually.

Referring now to Figs. 14to 17 inclusive,

I I have found that as a result of the opening of the switch 117' under the control of the cam disk 113 at the end of the operating cycle, and the consequent interruption of the flow of current to the motor magnet17, an induction field is created which is suflicient to effect a. variation of the current in the plate circu t and thus cause the relay" 46 to start the controller. In order to insure that the tube shall not be afl'ected in this manner, I provide means operating near the end of the cycle to on the shaft 5 of the controller between the grid discharge wheel or disk 119 and the cam d sk 113. Also mounted on the shaft 5 and rigid therewith is a disk 127 (Fig. 18) having a pin 128 therein entering a slot 129 in the grid discharge wheel 119, the latter being loose on the shaft. The weight 126 has a pin 130 therein which projects laterally into an elongated slot 131 in the cam disk 113.

'In F? g. 14 the parts are shown in the relation which they occupy after the controller has operated through slightly half cycle. Obviously the weight 126 is being carried upwardly by the engagement of the pin 130 on the weight with the trailing end of the slot 131 in the cam disk 113. In Fig. 15 the parts are shown near the end of the cycle. Thus the weight 126 has been carried by the disk 113, into its uppermost position, and then slightly beyond through the action of gravity, until stopped by a laterally projecting lug 132 on the weight 126 which engages with a laterally extending stop finger 133 (Fig. 18)

on the movable contact arm of the switch 117.

At this time the movable contact of the grid discharge switch .122 is raised by an elongated tooth or segment 134 on the id discharge wheel 119, the latter being held back by friction between the't0 oth134 and the follower 121. In the continued operation of the motor magnet 17, the notch 114 in the controlling cam disk 113 becomes positioned (Fig. 16) so as to receive the follower 115 of the mov able contact of the switch 117, thus opening the switch 117; but the follower 121 of the switch 122 continues to be held raised by the elongated tooth or segment 134 (Fig. 16). In such movement of the follower 115 into the notch 114, the stop finger 133 moves down-- laterally from the grid discharge wheel 119.

more than a,

slot 131, until it strikes a pin. 135 projecting r The force of the impact. operates to move the grid discharge'wheel as permitted by the slot 129, so as to move the elongated tooth or segment 134fron1 beneath the follower 1210f the grid discharge switch 122 (Fig. 17).

Thus, it will be evident that by the construction provided, the final discharge .of the grid is prolongeduntilafter the opening of the circuit to the motor magnet, "whereupon the grid discharge means is moved to initial or normal position so as to restore the tube 101 for the reception of the next signal.

While I have herein illustrated and described my invention with considerable particularity, it is contemplated that various changes in the construction and arrangement employed may be made by those skilled in the art without departing from the spirit and scope of the invention as expressed in the appended claims. I desire to have it expressly understood that the selective controller is not limited to use with a receiving apparatus responsive to radiant energy, for obviously the controlling codal signal may be represented by electric current impulses transmitted over a wire. On the other hand, I have employed the term radiant energy in a generic. sense, as including the various forms of energy which exist in or travel through space, such, for example, as electrostatic energy, Hertzian waves, sound and light.

Moreover it should be understood that while I have herein illustrated and described a vacuum tube as themeans respons We to the transmitted radiant energy fields, do not intend to be limited to such a device, it being obvious that any other thermionic device may be employed as an equivalent element.

The vibratory motor, not herein claimed per se, is made the subject of a copendingapplication filedFebruary 15, 1929, as Serial No.-

340,217, by myself and Duncan J. Stewart, jointly.

I claim as my invention:

1.. A controller of the character described comprising, in combination, a drum having a series of individually movable selector elements arranged in circular series, a signal-responsive operating device, drive means for rotating said drum, means momentarily operative under the control of said signal responsive means to start the driving means, said drivingvmeans being operable when once started tocarry all of said elements in rapid succession into operative association with said device for selective operation thereby whereby a predetermined combination of said elements are operated. and a control device operable upon the selection of such combination of elements.

v 2. A controller of the character described comprising, in combination, a drum formed in two sections and having a plurality of selector elements arranged in circular series and normally locking said two sections together, signal-responsive means for operating a predetermined combination in said elements, said elements being operated in such combination to release the two sections of the drum for relative movement, and a control device operated in such relative movement between the two sections of the drum.

3. A controller of the character described having, in combination, a plurality of selecmit yielding thereof according to the character of the received signal.

4. A controller of the character described having, in combination, a plurality of selector elements and a rotary carrier therefor,

and means for operating said elements selectively including a member yieldably held in the path of movement of the selector elements, and means positioned to prevent said member from yielding but movable into another position out of holding relation to said member.

5. A controller of the character described comprising, in combination, a plurality of selector elements, a carrier in which said elements are arranged in spaced relation, a device for operating said elements, means for effecting relative movement between said elements and the operating device, said operating device comprising a member having an actuating surface normally disposed in the path of the elements successively presented thereto, said member being mounted so as to be capable of yielding out of operative relation to said elements, and selectively operable means for holding said member against yielding to efl'ect movement of the engaged element out of normal position. i

6. A controller of the character described comprising, in combination, a plurality of selector elements, a carrier for said elements, and means for operating said elements selectively comprising a member adapted when held in an operating position in the path of said elements tomove them relative to the carrier, said member being movable out of said operating position, a stop, and a signalresponsive device operable to move relative to said member and said stop whereby to hold said member in its operating position.

7 A controller of the character described comprising, in combination, a plurality of selector elements, a carrier for said elements, an operating member for said elements, means for effecting relative movement between said member and the carrier to present ,7

said elements successively to said operating member, a stop, and a signal-responsive device including a finger movable into and out of interlocking relation with said stop and said member whereby the stop becomes effective to prevent movement of the member comprising a drum formed 1n two sections and having a plurality of selector pins mounted thereon and normally locking said two sections of the drum together, means for operating said ins selectively, said pins being adapted w en operated in a predetermined combination to release the two sections of the drum for relative movement, a

device normally operating to prevent relative movement between said two sections, and means operable at a predetermined point in the rotation of the drum to render the said device ineflective.

10. A controller of the character described comprising a drum formed in two sections and having a plurality of selector pins mount-.

ed thereon and normally locking said two sections of the drum together, means for operatin said pins selectively, said pins being a apted when operated in a predetermined combination to release the,two sec tions of the drum for relative movement, and

a device operable at a predetermined point in the rotation of the drum to permit a limited relative movement between said two drum sections, said device being subsequent,

31y operable to reset the two sections of the rum in theirnormal relation.

11. In a controller of the character dewq scribed, a drum formed in two sections and fihaving a plurality of selector elements mounted therein normally arran ed to lock the two sections together, means, oroperating said elements in a predetermined combination to 5 release the two sections for relative movement, a device operable to permit a limited relative movement between the two sections including a pin mounted in one section and a slot in the other section, said pin having a part thereon slidable axially through one section and having a seat in the other section, and said part when moved into said seat being adapted to position the two sections in their normal relation.

12. In a controller of the character described, a drum formed in two @tions and having a plurality of selector elements mounted therein normally arranged-to lock the two sections together, means for operata at ing said elementsin a predetermined combination to release the two sections for relative movement, a pin mounted in one sectionand a slot in the other section, said pin having a part thereon slidable axially through one section and having a seat in the other seedrum for moving said part out of its seat whereby to permit relative rotation between the two sections of the drum to an extent determined by the length ofsaid slot.

' 13. In a controller of the class-described, a drum composed of two sections and having a plurality of pins arranged in circular series, said pins being also formed in two sections and certain of the pins normally having their dividing lines offset with respect to the dividing line between the two sections, and the other pins normally having their dividing lines coinciding with the line between the two sections, means operable in the rotation of the drum to move the first mentioned group of pins so as to position their dividing lines between the two sections and thereby release the two sections to relative movement, and a control. device operable in such relative movement between the two sections.

, 151. A controller of the class described com- )rising, in combination, a pair of discs aving a plurality of selector' elements certain of which operate to hold the disks normally against relative rotation and certain of'which normally permit relative rotation,

means for rotating said disks, signal-respon-v sive means adapted in the rotation of'the disks to move those pins normally locking the disks together intonon-holding relation to the disks to release the latter for relative rotation, and a control device operable by such relative movement between the disks.

15. A controller ofthe character described comprising, in combination, a rotary device, a plurality of'selector elements carried by said device for rotation therewith, means for rotating said device through a given cycle, means operable by energy derived from the rotation of the device and including a selectively movable part adapted to set said ele-' ments in a predetermined combination and a control device operable only upon the selection of said combination.

16. A v controller of the character described comprising, in combination, a rotary device, a plurality of pins carried by said device for rotation therewith, means for rotating said device through a given cycle, means se lectively operable in the rotation of the device to operate a predetermined combination of saidpins, said rotary device further comprising a pair of disks normally blocked against relative rotation by certain of said pins, and released for relative rotation when said pins are operated, means acting near the end of each cycle tending to restrain one of said disks-to effect such relative movement and a control device operable in such relative of the disks to move relative to theother when thus released, and a control device operable in the relative movement between the disks.

18. A controller having, in combination, a rotary device comprising a pair of disks, selector elements mounted for longitudinal movement relative to the disks and normally locking the disks for rotation together, said elements being adapted when positioned in accordance with a predetermined combination to release the two disks for relative rotation, and means operating at a predetermined point in the rotation of the disks to restore them to their normal relation.

19. A controller having, in combination, a rotary device comprising a pair of disks, selector elements mounted for longitudinal movement relative to the disks and normally locking said disks for rotation together, said elements being adapted when positioned in accordance with a predetermined combination to release the two disks for relative rotation, means operating to effect such relative rotation, means subsequently operating to restore the disksto their normal relation, andni-eans for resetting the elements when such normal relation has been restored.

20. The combination of a carrier having two parts, a set oil movable elements normally operating to holdthe parts together and a set of movable elements normally permitting movement of one of the parts, the first set of elements being movable into positions whereby to release the connection between the parts and thesecond set of elements being adapted when moved to lock the parts together, and signal-responsive means adapted to operate the first set of elements only upon receipt of the predetermined signal combination.

21. In an apparatus of the character described, the combination of a controller having a series of selector elements and arranged to operate through a predetermined cycle, means adapted to operate a predetermined combination of said elements during such operating cycle including a receiver having a detector tube, and electromagnetically controlled means for operating said selector ele' ments, said tube including a grid, and means operating periodically to discharge the accumulation of negative potential on the grid.

22. A selective signaling apparatus having,

.in combination, two members mounted for relative rotation, one of said members having'a series of elements with which the other member isoperatively associated successively, and signal-responsive control means including 'a detector tube with electromagnetic means in the output circuit thereof, and means operating to discharge the grid of the tube at a predetermined time after the assoi iation of the one member with each of the elements of the other member.

23. The combination of a controller having a series of selector elements and operable through a predetermined cycle, and signal responsive means for operating said elements in a predetermined combination including an operating member with which said elements are adapted to engage successively, electromagnetic means tor controlling said member, means responsive to successive fields of radiant energy adapted to operate said electromagnetic means and including a three ele- .ment detector, tube having a grid, and means for discharging the grid after the engagement of each of said selector elements with the operating member.

2%. In a signaling apparatus, the combination of a controller having a series of selector elements, an operating member to which said elements are presented in succession, signalresponsive means for controlling said operating member including a detector tube having a cathode and a controlling element, electromagnetic means in the output circuit of said tube, and means for periodically connecting the controlling element of the tube to a point Whose potential is approximately equal to the potential of the cathode or positive thereto.

25. In a signaling apparatus, the combination of a controller having a series of selector elements, an operating member to which said elements are presented in succession, signalresponsive'means for controlling said operating member including a detector tube having a cathode and a controlling element, electromagnetic means in the output circuit of said tube, and means for periodically connecting the controlling circuit of the tube to a point x hose potential is approximately equal to th potential of the cathode or positive thereto including a switch, and a rotary element operating synchronously with said controller whereby to operate said switch.

. 26. The combination of a controller having a series of selector elements ar,ranged in a predetermined spaced relation with the elc ments near the end of the series spaced a greater distance apart than the elements at the beginning of the series, signal-responsive means including a detector tube having a controlling circuit and a controlled circuit, and means periodically connecting the conrolling circuit to a point whose potential is approximately equal to the potential of the cathode of the tubeor positive thereto including a rotary device and a switch, said device having means for operating said switch spaced substantially in accordance with the spacing of said selector elements.

27. In a signaling apparatus, the combination of a controller having a series of selector elements and an operating device, means operating to efifectengagement between said elements and said device in succession, and means for controlling said operating device including a detector tube having a grid and a device for periodically discharging the grid including a switch and a series of elements arranged to operate 'the switch successively, the selector elements near the end of the series being'spaced a greater distance apart than the elements at the beginning of the series, and the switch operating elements being correspondingly spaced apart.

28. In a signaling apparatus, the combination of a controller having a series of independently movable selector elements and a device operable upon said elements selectively to set the same in a predetermined combination, signal-responsive means for controlling said device, and means for controlling the signal-responsive means includi-nga second series of relatively fixed elements and a' pair of switch contacts controlled thereby, the elements near one end of: eachof the series being spaced a greater distance apart of the series.

29. The combination of a series of selectmg elements and a carrier therefor, a member arranged to operate .upon said elements successively, means for operating the carrier to present said elements to said member successively'including a motor, a normally open circuit for supplying electric energy to said motor, electromagnetic means for closing said circuit, and means also operated by said electromagnetic means for controlling said member to effect a setting of said elements selectively in a predetermined combination.

30. In a selective signaling apparatus, the combination of a series of selector elements and a rotary carrier therefor, a member to operate upon said 1 elements successively, signal-responsive means for controlling said member including a detector tube having electromagnetic means in the output circuit thereof, means for rotating the carrier including a motor, a circuit for sup plying energy to the motor and having a switch operable at a predetermined point in the rotation of the carrier to open said circuit, and means for preventing the accumulation or potential on the grid of said tube during the opening of said circuit by the switch.

31. In a selective signaling apparatus, the combination of a series of selector elements and a rotary carrier therefor, a member to operate upon said elements successively, signal-responsive means for controlling said member including a detector tube having electremagnetic'means in the controlled circuit thereof, means for rotating the carrier includin g a motor, a circuit for supplying energy to the motor and having a switch operable at a predetermined point in the rotation of arcane combination of a series of selector elements.

and a carrier therefor, a member arranged to operate upon said elements successively, signal-responsive means for controlling said member including a detector. tube, the detector tube having a controlling circuit and a controlled circuit, electromagnetic means in the output circuit of the tube for operating said member, means for periodically connecting the controlling circuit to the ground once for each of said elements whereby to 'discharge the tube, means for driving said carrier including an electromagnetic motor, and a circuit for supplying energy to said motor having a switch arranged to be opened after a predetermined-operating cycle of the carrier,

the means for discharging the tube being effective durin the opening of said switch but ineffective a ter the opening of said switch.

33. In a selective signaling apparatus combination of a member arranged to rotate through successive cycles,1means for driving said member including an electromagnetic motor, acircuit for supplying energy to said motor, and having a switch adapted to be opened at the end of each operating cycle, signal-responsive means operating in the ro tation of said member and including a detector tube having a grid and means for discharging the grid during the opening of said switch, andmeans for rendering said discharge means inelfective after the opening of said switch, whereby to restore the grid to a receptive condition for the next cycle of operation.

34;A selective receiver ,of the start-stop type comprising, in combination with a plurality of selector elements, means for controlling the operation of said elements including an operating part arranged for association successively with said elements and a signalresponsive part for controlling the operating part, said signal-responsive part includlng means operable to receive a signal unit, and

controlling means for the last mentioned means operating in advance of the association with the operating part of the selector element to be controlled by said unit and adapted toretain the character of said unit until said operating part becomes effective to operate said selector element.

35. A selective receiver of the start-stop type comprising, in combination with a plurality of selector elements, means for controlllngthe operation of said elements including an operating part arran ed for association successively with said e ements and a signal-responsive part for controlling the operating part, said signal-responsive part including a detector tube having a grid serving to retain the character of a given signal unit, and means for discharging the grid to terminate the period of control by said unit.

36. In a selective signalling apparatus, the combination of a receiver having aselector operable through a predetermined cycle and having a series of elements to be operated selectively under the control of a received signal combination, means responsive to the signal units and adapted for periodic operation with respect to said elements, each operating cycle of the selector being divided into a plurality of control periods, and means controlled by the operation of the selector for governing said signal responsive means so as to determine the efi'ective duration of each of said control periods.

37. A selective receiver of the start-stop type comprising, in combination with a plurality of spaced elements, means for distributing the units of a received signal combination to said elements including an operating .part arranged for association. successively with said elements and a signalresponsive part for controlling the operating part, said signal responsive part including an electro-magnet, and means operating during the association of any one selector element with said operating part to condition the magnet for the succeeding signal unit.

38. A selective receiver of the start-stop type comprising, in combination with a plurality of selector elements, means for controlling the operation of said elements in cluding an operating part arranged for association successively with said elements and a signal-responsive part for controlling the operating part, said signal responsive part including a detector tube circuit having an electromagnet therein, and means operating in advance of the association of a selector element with said operating part to discharge the detector tube whereby to condition the magnet for the succeeding signal unit.

39. A selective receiver comprising a' series of selector elements, signal responsive means to be operated in a predetermined combination to set said elements selectively, and means for detecting the setting of said elements in a predetermined combination comprising a member controlled by said elements, and means including a yieldable stop for actuating said member when said elements have been set in the predetermined combination.

40. A selective receiver comprising, in combination, a series of selector elements, signal-responsive means adapted to operate said selector elements in a predetermined combination, a pair of members movable conjolntly with said elements and adapted for relative movement only when the predetermined combination has been selected,

and a device operable as an incident to such relative movement between said members.

41. A selective receiver comprising, in combination, a series of selector elements, signal-responsive means adapted to set said selector elements in a predetermined combination, a device to be operated, and a pair of members adapted for relative movement only upon the setting of said elements in the predetermined combination, said device including a pair-of yieldable stops, and means on said pair of members for engaging the respective stops to operate said device in the changed positions of said pair of members.

42. In a signaling apparatus, the combination of a rotary device, driving means therefor, a plurality of movable selector elements carried by said device for rotation therewith, an electromagnet, and means including a selectively movable part operating under the control of the magnet by energy derived solely from the motion of said driving means,

to operate said selector elements selectively).

43. A selector for a signaling system com prising, in combination, a plurality of selector elements arranged in parallel relation for bodily movement and also for individual movement into either of two set positions, a pusher device normally 'disposed in the path of the elements successively presented thereto 'and adapted by engagement with each element to shift it out 0 normal set position or to yield and allow the element to ass unpushed, a control element movable into and out of blocking relation with said pusher, and a member adapted to be controlled in its movements by the setting of said elements by said pusher device.

4A. In a selective receiver, the combination of a series of selector elements, a yieldable member, means for effecting a movement of translation between said elements and said member, and signal responsive means operative to hold said member in a position to move said elements in the operation of said translating means.

45. A selector mechanism having, in combination, a rotary device comprising a pair of disks, a series of selector elements for controlling the relative angular positions of said disks and normally locking the disks together, signal-responsive means for operating said elements in a predetermined combination whereby to permit a change in the relative positions of the disks, and a means to be operated controlled by such change in the positions of the disks.

46. A selective signal receiver having, in combination, a series of selector elements, a pair of members normally locked against relative movement b said elements and movable COIljOlIltlY Wlth said elements through a signal cycle, the relative positions of said members being controlled by the positions of change in the positions of said two members as ermitted by said elements.

4 A selector for a signaling system comprising, in combination, a plurality of selector elements supported for bodily movement transversel of their lengths and also for individual a justment, signal responsive adapted for movement independently of said elements when the elements are set 1n a predetermined combination, and a deviceto be operated responsive to said independent movement of the member.

48. A selective receiver having, in combination, a series of selector elements, a pair of members controlled said elements, a signal-responsive device, eans for efi'ecting a movement of translation between said elements and said device through a predetermined operating cycle, said elements being adapted when operated in a predetermined combination to permit a change in the relative positions of the two members, a device to be operated responsive to said change in the positions of the two members, and means operating at the end of each operating cycle to reset said two members in their normal relative positions. i

49. A selective receiver having, in combination, a series of selector elements, a pair of members movable with said elements, a signal-responsive device, means for effecting a movement of translation between said elements and said device through a predetermined operating cycle, said elements being adapted when operated in a predetermined combination to permit a change in the relative positions of the two members, and a device to be operated responsive to said change in the positions of the two members, the de- Vice to be operated comprising a switch having a pair of contacts,'and means on said members for controlling said contacts accord ing to the relative bers.

- 50. A selective receiver of the start-stop type comprising a rotary carrier having a series of individually movable selector elepositions of the two memments, a signal responsive device, and means for effecting a movement of translation between said device and said selector elements in which said elements are adapted to be operated selectively, said means comprising a vibratory motor, signal-responsive means for startingthe motor for operation through a. complete cycle, and means operating automatically to continue the operation of the motor and to stop it at the end of said predetermined cycle, said vibratory motor being connected with a source of alternating current and adapted to attain its normal torque and speed substantially instantaneous- 1y upon. the closing of the motor circuit while maintaining crating cyc e 51. A selective receiver of the start-stop type comprising an element to be rotated at a substantially uniform speed through one revolution, a vibratory motor for driving said element, a source of alternating current, signal responsive means for connecting said momeans controlling said adjustment, a member tor w1th the source of alternating current to movable conjointly with said elements and.

start said element, said motor being adapted to attain its normal torque and speed substantially instantaneously and to maintain the such speed throughout the opspeed substantially uniform, and means operating to cut off the supply of current to the motor at the end of the operating cycle to stop theelement, the connection between the motor and said source of current comprising a temporary starting circuit adapted to be controlled by said signal-responsive means, and a main circuit controlled by the movement of said element.

52. A selective receiver of the start-stop type comprising a series of selector elements and a rotary carrier therefor, signal-responsive means adapted to operate said elements selectively in the rotation of the carrier, an electric motor for rotating the carrier, said signal responsive means including a magnet, a starting circuit controlled by said magnet and adapted to supply electric energy to the motor temporarily to start the same, and a main supply circuit controlled by the rotation of the carrier at the beginning and end of its operatingpycle.

53. A selective receiver comprising a series of selector elements, signal-responsive means, means for effecting a movement of translation between said elements and said signal-responsive means in which said elements are adapted to be operated selectively under the control of said means, said signalresponsive means including a signal-responsive part and an independently movable operating art, said operating part comprising a yielda le member, and the signal-responsive art including a locking member, said mem ers being adapted to be held in interengaging relation by the engagement of a selector element with the operating part.

54, In a signaling apparatus, the combination of a detector tube having a controlled circuit and a controlling circuit, a connection between the controlling ircuit and the ground having a switch therein, a selector mechanism comprising a series of selector elements and a signal-responsive device adapted to control the operation of said elements, and means for intermittently operating said switch to control the operation of the signaL.

,selector elements, a signal responsive device including a'detector tube, means including an electric motor for effecting a movement of 

